[ənˈtɪl]
conj./prep. 直到;到…时;直到…为止
1)用于肯定句,意为“到…时;直到…为止”,引导时间状语从句,主句谓语动词用延续性动词。
I will stay here until you come back. 我将呆在这里直到你回来。(stay是延续性动词)
Continue in this direction until you see a sign.一直沿着这个方向走,直到你看见一个指示牌为止。(主句是祈使句,continue是延续性动词)
He worked until it was dark. 他一直工作到天黑。(work是延续性动词)
2)用于否定句,not...until的意思是“直到…才”,引导时间状语从句,主句谓语动词一般用短暂性动词。短暂性动词就是瞬间完成的动词,如go,come,leave, die, arrive,buy, enter等, 以enter为例,我们“进”这个动作一瞬间就完成了,不会持续。
I hadn’t realized she was foreign until she spoke. 直到她讲话我才意识到她是外国人。